public class Example5_1 {
public static void main (String args[]) {
  Student zhang =new Student();
  zhang.age=17;
  zhang.number=100101;
  zhang.showPeopleMess();
  zhang.tellNumber();
  int x=9,y=29;
  System.out.print("会做加法");
  int result=zhang.add(x,y);
  System.out.printf("%d+%d=%d\n",x,y,result);
  UniverStudent geng = new UniverStudent();
  geng.age=21;
  geng.number=6609;
  geng.showPeopleMess();
  geng.tellNumber();
  System.out.print("会做加法:");
   result=geng.add(x,y);
  System.out.printf("%d+%d=%d\t",x,y,result);
  System.out.printf("会做乘法");
  result=geng.multi(x,y);
  System.out.printf("%d+%d=%d\n",x,y,result);
}
}

